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  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.*;
  4. import java.lang.*;
  5. import java.io.*;
  6.  
  7. /* Name of the class has to be "Main" only if the class is public. */
  8. class Ideone
  9. {
  10. 	public static void main (String[] args) throws java.lang.Exception
  11. 	{
  12. 		int[] a = {10,30,20,40};
  13.  
  14. 		System.out.println("Test Case 1 Min Cost: " + minCostFrogJump(a));
  15.  
  16. 		int[] b = {30, 10, 60, 10, 60, 50};
  17.  
  18. 		System.out.println("Test Case 2 Min Cost: " + minCostFrogJump(b));
  19. 	}
  20.  
  21.  
  22. 	public static int minCostFrogJump(int[] height) {
  23. 		int n = height.length;
  24. 		if (n <= 1) return 0;
  25.  
  26. 		// dp[i] stores the minimum cost to reach stair i
  27. 		int[] dp = new int[n];
  28.  
  29. 		dp[0] = 0; 
  30. 		dp[1] = Math.abs(height[1] - height[0]); 
  31.  
  32. 		for(int i = 2; i<n; i++){
  33. 			int jumpOne = dp[i - 1] + Math.abs(height[i] - height[i - 1]);
  34. 			int jumpTwo = dp[i-2] +Math.abs(height[i] - height[i-2]);
  35.  
  36. 			dp[i] = Math.min(jumpOne,jumpTwo);
  37. 		}
  38.  
  39. 		return dp[n-1];
  40. 	}
  41. }
Success #stdin #stdout 0.14s 55592KB
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Standard input is empty
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Test Case 1 Min Cost: 30
Test Case 2 Min Cost: 40
https://ideone.com/xWEXyH
language:
Java (HotSpot 12)
created:
4 hours ago
visibility:
public

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